Good luck learning proper German from Austrians. ;-)
My experience of Austrians is that they are a bit insular and have long been, for want of a milder word, just a little bit more racist than we are accustomed to in the United Kingdom. I was told a number of times in the early 2000s by Austrians that, although I was a foreigner, I was an alright foreigner because I’m not dark. (Du bist nicht dunkel) This was stated as a matter of fact without fhe idea that the sentiment should be problematic. So my point is that I don’t think the refugee crisis has changed opinion much in Austria. They were sceptical about refugees from the start.
As for the Turkish population and mosques and so on. I think it’s just that the Turkish minority has reached a certain level that makes some white Austrians feel uncomfortable, and right wing politicians are exploiting that. From what I’ve seen the Turkish minority is long established and were well on the way to finding their own fit within Austrian society. These laws that target mosques and make them feel unwelcome are not going to help that process. Unfortunately alienation and discord is exactly what the right wing politicians are hoping to achieve. So who knows how this will play out.